Subtract 1/7 from 90/27
1st number: 3 9/27, 2nd number: 1/7
90/27 - 1/7 is 67/21.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 27 and 7 is 189
Next, find the equivalent fraction of both fractional numbers with denominator 189 - For the 1st fraction, since 27 × 7 = 189,
90/27 = 90 × 7/27 × 7 = 630/189 - Likewise, for the 2nd fraction, since 7 × 27 = 189,
1/7 = 1 × 27/7 × 27 = 27/189 - Subtract the two like fractions:
630/189 - 27/189 = 630 - 27/189 = 603/189 - After reducing the fraction, the answer is 67/21
- In mixed form: 34/21
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